hey there. I need a little help...

when i try open in "Backpack" my TF2 inventory: everything is fine, everything opens.
but when i click "Steam inventory" fisrt time i see a message:
"Sorry, but your backpack couldn't be loaded at this time — Your inventory or your profile is set to private, so we couldn't retrieve your items. Please set your profile and inventory privacy to public."
and when i second time click "Steam inventory" (or refresh page): i see empty slots... but in my inventory, a lot of things...

why i can't see my steam's things, when i see tf2's things???

my profile are "Public"...

P.S. Thank's